Add support for the RetroFighters Defender Controller

[nefarius]

Reminder. For reference.

[nefarius]

Defender BT (2nd model)

Wireless support was added in #364 and confirmed working (all features; input, LED and rumble).

Currently it is only possible to get it working on PC via the following procedure:

• Connect/pair the Defender BT to a PS3 once
• Turn off and unplug both Defender and console
• Spoof the PS3 MAC address on the Windows machine
• The Defender will now connect to PC

Problem with pairing on Windows is that the Defender is one of those "smart" controllers that detect which host they are connected to, so it switches to an X360 replica on USB on Windows, which blocks sending it the pairing packet. More R&D is required for this.

Defender (OG, 1st model)

To attempt to get USB to work #321 is required to be fixed first.

Leaving the issue open until both models are covered to whatever level is technically possible.